From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from zimbra2.kalray.eu ([92.103.151.219]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jKpQ9-0002bd-Sx for barebox@lists.infradead.org; Sat, 04 Apr 2020 20:29:40 +0000 From: Clement Leger Date: Sat, 4 Apr 2020 22:29:09 +0200 Message-Id: <20200404202910.12524-6-cleger@kalray.eu> In-Reply-To: <20200404202910.12524-1-cleger@kalray.eu> References: <20200404202910.12524-1-cleger@kalray.eu> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 5/6] clocksource: kvx: Add kvx clocksource support To: Sascha Hauer , barebox@lists.infradead.org Cc: Clement Leger Add a clocksource for kvx architecture based on core performance counter. This performance counter is configured to count cycles and as such can be used to be a clocksource. Signed-off-by: Clement Leger --- arch/kvx/configs/generic_defconfig | 1 + drivers/clocksource/Kconfig | 4 ++ drivers/clocksource/Makefile | 1 + drivers/clocksource/kvx_timer.c | 59 ++++++++++++++++++++++++++++++ 4 files changed, 65 insertions(+) create mode 100644 drivers/clocksource/kvx_timer.c diff --git a/arch/kvx/configs/generic_defconfig b/arch/kvx/configs/generic_defconfig index 3f7bb0f19..d0c2252bf 100644 --- a/arch/kvx/configs/generic_defconfig +++ b/arch/kvx/configs/generic_defconfig @@ -1,6 +1,7 @@ CONFIG_AUTO_COMPLETE=y CONFIG_BAUDRATE=115200 # CONFIG_BOOTM is not set +CONFIG_CLOCKSOURCE_KVX=y CONFIG_CMD_CMP=y CONFIG_CMD_OF_DUMP=y CONFIG_CMD_POWEROFF=y diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 39ddd159f..8805cda39 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -47,6 +47,10 @@ config CLOCKSOURCE_EFI_X86 bool "EFI X86 HW driver" depends on EFI_BOOTUP && X86 +config CLOCKSOURCE_KVX + bool "KVX core timer clocksource" + depends on KVX + config CLOCKSOURCE_MVEBU bool depends on ARCH_MVEBU diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index cba6344bb..b4607f787 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_CLOCKSOURCE_CLPS711X) += clps711x.o obj-$(CONFIG_CLOCKSOURCE_DIGIC) += digic.o obj-$(CONFIG_CLOCKSOURCE_EFI) += efi.o obj-$(CONFIG_CLOCKSOURCE_EFI_X86) += efi_x86.o +obj-$(CONFIG_CLOCKSOURCE_KVX) += kvx_timer.o obj-$(CONFIG_CLOCKSOURCE_MVEBU) += mvebu.o obj-$(CONFIG_CLOCKSOURCE_NOMADIK) += nomadik.o obj-$(CONFIG_CLOCKSOURCE_ORION) += orion.o diff --git a/drivers/clocksource/kvx_timer.c b/drivers/clocksource/kvx_timer.c new file mode 100644 index 000000000..be2545ed0 --- /dev/null +++ b/drivers/clocksource/kvx_timer.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2018 Kalray Inc. + */ + +#include +#include +#include + +#include +#include + +#include + +static uint64_t kvx_pm_read(void) +{ + return kvx_sfr_get(PM0); +} + +static struct clocksource kvx_clksrc = { + .read = kvx_pm_read, + .mask = CLOCKSOURCE_MASK(64), + .shift = 0, +}; + +static int kvx_timer_probe(struct device_d *dev) +{ + struct clk *clk; + uint32_t clk_freq; + struct device_node *np = dev->device_node; + + /* Get clock frequency */ + clk = of_clk_get(np, 0); + if (IS_ERR(clk)) { + pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk)); + return PTR_ERR(clk); + } + + clk_freq = clk_get_rate(clk); + clk_put(clk); + + /* Init clocksource */ + kvx_clksrc.mult = clocksource_hz2mult(clk_freq, kvx_clksrc.shift); + + return init_clock(&kvx_clksrc); +} + +static struct of_device_id kvx_timer_dt_ids[] = { + { .compatible = "kalray,kvx-core-timer", }, + { } +}; + +static struct driver_d kvx_timer_driver = { + .name = "kvx-timer", + .probe = kvx_timer_probe, + .of_compatible = DRV_OF_COMPAT(kvx_timer_dt_ids), +}; + +device_platform_driver(kvx_timer_driver); -- 2.17.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox